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聚合物驱后油藏仍有大量剩余油残留其中,为探讨进一步提高聚合物驱后油藏的原油采收率的方法,利用人造非均质大平板岩心,开展了凝胶与聚合物、凝胶与聚合物/表面活性剂二元复合体系(简称聚表二元体系)多轮次交替注入的驱油效果研究。结果表明,交替注入0.26 PV凝胶与0.39 PV聚表二元体系进行驱油实验,采出程度可在聚合物驱采收率基础上提高11.29%,凝胶与聚合物溶液交替注入驱油阶段采出程度可提高7.10%,说明凝胶与聚表二元体系交替注入驱油技术对聚合物驱后剩余油的进一步挖潜更具潜力,但与凝胶与聚合物交替注入驱油技术相比,其成本相对较高。在现场进行实际技术优选时应综合考虑成本及市场原油价格等因素。
After the polymer flooding, a large amount of remaining oil remained in the reservoir. To explore a method to further enhance the oil recovery of the reservoir after polymer flooding, the artificial heterogeneous large flat core was used to carry out gels and polymers, Study on Flooding Effect of Glue and Polymer / Surfactant Binary Composite System (Short Form of Polyblend Binary System) by Multiple Alternating Injections. The results show that alternately flooding 0.26 PV gel and 0.39 PV polyblend binary system for oil displacement experiment, the recovery rate can be increased by 11.29% on the basis of polymer flooding recovery rate. The gel and polymer solution are alternately injected into the flooding stage The degree of recovery can be increased by 7.10%. It shows that the alternative injection and flooding technology of gel-poly binary system has more potential for further tapping of remaining oil after polymer flooding. However, compared with the gel-polymer alternative injection flooding technology , The cost is relatively high. Actual technical optimization at the site should take into consideration factors such as cost and market crude oil price.